Head noun: ethylenediamine
Postmodifier: tetraacetic acid

Same concepts
http://dbpedia.org/resource/Ethylenediaminetetraacetic_acid

Broader concepts

labelprovenanceconfidence
chelating agentisap:4653170030.492650
aminopolycarboxylic acidisap:3335281320.460731
groupisap:4654431310.421685
agentisap:4653170020.344385

Narrower concepts

labelprovenanceconfidence